added writing capacilities to files and made the appropriate changes to the filedemo.c file

README.md

@@ -2,7 +2,7 @@
 
 I got bored with having to use complicated checking and stuff when working with files and arrays in C, so I implemented a new `file_t` struct which can load the contents of a file into a dynamically allocated array (yes, there is an implementation of those here as well... (`vector_t` struct)). The struct also stores the number of lines the file has.
 
-Also, I managed to come up with an implementation of a Python-like list (a vector of vectors of any type interpreted as just one vector). Quite handy, I'd say. The `list_t` struct is what you want to use when working with lists.
+Also, I managed to come up with an implementation of a kind-of-Python-like list (a vector of vectors of any type interpreted as just one vector). Quite handy, I'd say. The `list_t` struct is what you want to use when working with lists.
 
 The difference between a `vector_t` and a `list_t` is that a vector can only be of one type, whereas a list can have values of any type inside it (in this context, any means types defined in this library and default types in C).
 
@@ -22,8 +22,7 @@ Examples of this work of art are in the `/examples/` directory of this repo.
 3. Copy a file to another file
 4. Move a file to another file
 5. Rename a file
-6. Delete a file
-7. Empty a file
+6. Delete a file?
 8. Add line numbers at the beggining of each line in a file
 
 + You tell me
@@ -44,6 +43,7 @@ Examples of this work of art are in the `/examples/` directory of this repo.
 
 1. Removing an element at a given index
 2. Vectors of lists
+3. Remove a value at a given index
 
 + You tell me
 
@@ -67,10 +67,10 @@ Examples of this work of art are in the `/examples/` directory of this repo.
 
 ## Installation
 
-`git clone https://gitlab.com/Odweta/odwetalibc.git`  
-`cd odwetalibc`  
-`make install`  
+`git clone https://gitlab.com/Odweta/odwetalibc.git && cd odwetalibc && make install`
 
 #### Run demo
 
+(the library has to be installed with `make install`)
+
 `make && ./demo`

demo.c

@@ -1,21 +1,24 @@
-#include <odweta/vector.h>
+#include <odweta/file.h>
 #include <stdio.h>
 
 int main() {
-    printf("creating a vector using 'vectorInit(<type>)' (returns a vector_t*)\npossible type are: INT, FLOAT, CHAR, VECTOR (LIST in the future)\n");
-    vector_t* v = vectorInit(INT);
+    printf("creating a file using 'fileInit(<filename>)' (returns a file_t*)\n");
+    file_t* f = fileInit("test.txt");
 
-    printf("pushing an integer value into the vector\nnote the kind of unusual way of passing the number argument: if you want to pass an expression (e.g. the value '1' or '4*4'), something not stored in a variable, you follow this syntax - &(type){value} (e.g. &(int){1 + 1})\n->'vectorPush(vector_t*, &(int){123})'\n");
-    vectorPush(v, &(int){123});
-    vectorPrint(v);
+    printf("printing the file contents\n\n");
+    filePrint(f);
 
-    printf("popping the last value of the vector; in this case, it is an integer, so you type: 'int poppedValue = *((int *)vectorPop(vector_t*))'\n");
-    int poppedValue = *((int *)vectorPop(v));
-	printf("popped: %d\n", poppedValue);
-    vectorPrint(v);
+    printf("\nconvering the file contents into a string (char*)\n");
+    char* string = fileToString(f);
+    printf("\"%s\"\n", string);
 
-    printf("if you are finished working with the vector BEFORE the immediate end of the program, run 'vectorCleanup(vector_t*)', otherwise it is not strictly necessary\n");
-    vectorCleanup(v);
+    printf("writing is quite simple, just call the 'fileWrite(file_t*, char*)' or 'fileWriteln(file_t*, char*)' function, where the second argument is the string you want to write into a file\nthe 'fileWriteln()' function writes the specified string AND a '\\n' after it, whereas the 'fileWrite()' function does not append the '\\n'\n");
+	fileWrite(f, "'this will not end with a \"\\n\"' ");
+	fileWriteln(f, "this line was appended");
+	filePrint(f);
+
+    printf("if you are finished working with the file BEFORE the immediate end of the program, run 'fileCleanup(file_t*)', otherwise it is not strictly necessary\nit will, though, append a '\\n' at the end of the file if you have not done so, making writing into files more consistent, so for this reason, I recommend you use it with every file_t*\n");
+    fileCleanup(f);
 
     return 0;
 }

examples/file/filedemo.c

@@ -12,9 +12,12 @@ int main() {
     char* string = fileToString(f);
     printf("\"%s\"\n", string);
 
-    // TODO -> writing, clearing
+    printf("writing is quite simple, just call the 'fileWrite(file_t*, char*)' or 'fileWriteln(file_t*, char*)' function, where the second argument is the string you want to write into a file\nthe 'fileWriteln()' function writes the specified string AND a '\\n' after it, whereas the 'fileWrite()' function does not append the '\\n'\n");
+	fileWrite(f, "'this will not end with a \"\\n\"' ");
+	fileWriteln(f, "this line was appended");
+	filePrint(f);
 
-    printf("if you are finished working with the file BEFORE the immediate end of the program, run 'fileCleanup(file_t*)', otherwise it is not strictly necessary\n");
+    printf("if you are finished working with the file BEFORE the immediate end of the program, run 'fileCleanup(file_t*)', otherwise it is not strictly necessary\nit will, though, append a '\\n' at the end of the file if you have not done so, making writing into files more consistent, so for this reason, I recommend you use it with every file_t*\n");
     fileCleanup(f);
 
     return 0;

include/file.h

@@ -4,9 +4,10 @@
 #include <odweta/vector.h>
 
 typedef struct {
-	char* path; 							// the file descriptor
-	int length; 							// line count
-	vector_t* lines; 						// 2d array of chars
+	char* path;								// the file descriptor
+	int length;								// line count
+	vector_t* lines;						// 2d array of chars
+	int not_newline_terminated;				// bool: 1 = true, 0 = false
 } file_t;
 
 file_t* fileInit(char* path);				// initialization function
@@ -21,6 +22,4 @@ void fileWriteln(file_t* f, char* payload);	// appends a given string to the fil
 
 void fileWrite(file_t* f, char* payload);	// appends a given string to the file (not on a newline!)
 
-void fileClear(file_t* f);					// wipes the file contents
-
 #endif

include/vector.h

@@ -4,10 +4,10 @@
 typedef long unsigned int size_t;
 
 typedef enum {
-	INT,
-	FLOAT,
-	CHAR,
-	VECTOR // allows for multi-dimensional arrays
+	INT    = 0,
+	FLOAT  = 1,
+	CHAR   = 2,
+	VECTOR = 3 // allows for multi-dimensional arrays
 } dataType_e;
 
 typedef struct {

src/file.c

@@ -9,6 +9,10 @@ fileCountLines(file_t* f) {
 	char ch;
 	int lines = 0;
 	FILE* fd = fopen(f->path, "r");
+	if (!fd) {
+		fprintf(stderr, "unable to open file");
+		exit(EXIT_FAILURE);
+	}
 
 	while ((ch = fgetc(fd)) != EOF) {
 		if (ch == '\n') {
@@ -22,25 +26,43 @@ fileCountLines(file_t* f) {
 }
 
 void
-_fileLoadLines(file_t* f, FILE* fd) {
-    int lineLength;
+_fileLoadLines(file_t* f) {
     char ch;
-    vector_t* line = vectorInit(CHAR);
 
+    FILE* fd = fopen(f->path, "r");
+    if (!fd) {
+        fprintf(stderr, "unable to open file %s with mode \"r\"\n", f->path);
+        fclose(fd);
+        fileCleanup(f);
+        exit(EXIT_FAILURE);
+    }
+
+    char prev;
     for (int i = 0; i < f->length; i++) {
+        vector_t* line = vectorInit(CHAR);  // Create a new vector for each line
+
         while ((ch = fgetc(fd)) != '\n' && ch != EOF) {
             vectorPush(line, &ch);
         }
 
         // Skip the newline character if it exists
         if (ch == '\n') {
-        	char* empty = "";
-        	vectorPush(line, empty);
+            char* empty = "";
+            vectorPush(line, empty);
         }
 
         vectorPush(f->lines, line);
-        line = vectorInit(CHAR);
+
+		prev = ch;
+        // Don't free the line vector here, as it's now owned by the f->lines vector
     }
+    if (prev != '\n') {
+		f->not_newline_terminated = 1; // \n is NOT at the end of a file
+	} else {
+		f->not_newline_terminated = 0; // \n IS at the end of a file
+	}
+
+    fclose(fd);
 }
 
 char* 
@@ -51,47 +73,91 @@ fileToString(file_t* f) {
 file_t* 
 fileInit(char* path) {
 	file_t* f = malloc(sizeof(file_t));
-	if (f == NULL) {
-        perror("failed to allocate memory for the file\n");
-        exit(EXIT_FAILURE);
-    }
-
-	f->lines = malloc(sizeof(vector_t));
-	if (f->lines == NULL) {
-        perror("failed to allocate memory for the file contents vector\n");
+	if (!f) {
+        fprintf(stderr, "failed to allocate memory for the file\n");
         exit(EXIT_FAILURE);
     }
 
 	f->path = path;
 
-	FILE* fd = fopen(f->path, "r");
-	if (fd == NULL) {
-		fprintf(stderr, "unable to open file %s with mode \"r\"\n", path);
-		fclose(fd);
-		fileCleanup(f);
-		exit(EXIT_FAILURE);
-	}
-
 	f->length = fileCountLines(f);
-	f->lines = vectorInit(VECTOR); // vector of vectors of chars = vector of strings
-	_fileLoadLines(f, fd);
 
-	fclose(fd);
+	f->lines = vectorInit(VECTOR); // vector of vectors of chars = vector of strings
+	_fileLoadLines(f);
 
 	return f;
 }
 
 void
 fileCleanup(file_t* f) {
+	if (f->not_newline_terminated == 1) {
+		FILE* fd = fopen(f->path, "a");
+		fprintf(fd, "\n");
+		fclose(fd);
+		f->not_newline_terminated = 0; // just for piece of mind
+	}
 	vectorCleanup(f->lines);
 	free(f);
 }
 
 void
 filePrint(file_t* f) {
-	vector_t* line = vectorInit(CHAR);
 	for (int i = 0; i < f->length; i++) {
-		line = (vector_t *)vectorGetAt(f->lines, i);
-		vectorPrintAsString(line);
+		vectorPrintAsString((vector_t *)vectorGetAt(f->lines, i));
 	}
 }
+
+void
+fileWriteln(file_t* f, char* payload) {
+    FILE* fd = fopen(f->path, "a");
+    if (!fd) {
+        fprintf(stderr, "unable to open file %s with mode \"a\"\n", f->path);
+        fclose(fd);
+        fileCleanup(f);
+        exit(EXIT_FAILURE);
+    }
+
+    fprintf(fd, "%s\n", payload);
+
+    fclose(fd);
+
+	// Update the file structure without re-initializing
+	if (f->not_newline_terminated == 0) {
+		vector_t* line = vectorInit(CHAR);
+		for (int i = 0; i < strlen(payload); i++) {
+			vectorPush(line, &payload[i]);
+		}
+		vectorPush(f->lines, line);
+		f->length++;
+		f->not_newline_terminated = 0;
+	} else if (f->not_newline_terminated == 1) {
+		for (int i = 0; i < strlen(payload); i++) {
+			vectorPush((vector_t *)vectorGetAt(f->lines, f->length-1), &payload[i]);
+		}
+		f->not_newline_terminated = 0;
+	}
+}
+
+void
+fileWrite(file_t* f, char* payload) {
+    FILE* fd = fopen(f->path, "a");
+    if (!fd) {
+        fprintf(stderr, "unable to open file %s with mode \"a\"\n", f->path);
+        fclose(fd);
+        fileCleanup(f);
+        exit(EXIT_FAILURE);
+    }
+
+    fprintf(fd, "%s", payload);
+
+    fclose(fd);
+
+    // Update the file structure without re-initializing
+	vector_t* line = vectorInit(CHAR);
+    for (int i = 0; i < strlen(payload); i++) {
+		vectorPush(line, &payload[i]);
+	}
+    vectorPush(f->lines, line);
+    f->length++;
+	f->not_newline_terminated = 1;
+}

src/list.c

@@ -49,7 +49,7 @@ listPush(list_t* l, dataType_e type, void* element) {
             vectorPush((vector_t *)l->data, newVec);
             break;
         default:
-            perror("specify a valid vector type\n");
+            fprintf(stderr, "specify a valid vector type\n");
             exit(EXIT_FAILURE);
     }
 

src/vector.c

@@ -38,7 +38,7 @@ _printVectorRecursive(vector_t* v, int depth) {
                 _printVectorRecursive((vector_t *)(v->data + i * v->elementSize), depth + 1);
                 break;
             default:
-                perror("tried to print unsupported data type\n");
+                fprintf(stderr, "tried to print unsupported data type\n");
                 exit(EXIT_FAILURE);
         }
 
@@ -74,7 +74,7 @@ vectorPrint(vector_t* v) {
                 _printVectorRecursive((vector_t *)(v->data + i * v->elementSize), 0);
                 break;
             default:
-                perror("tried to print unsupported data type\n");
+                fprintf(stderr, "tried to print unsupported data type\n");
                 exit(EXIT_FAILURE);
         }
 
@@ -103,7 +103,7 @@ _printVectorAsStringRecursive(vector_t* v, int depth) {
                 _printVectorAsStringRecursive((vector_t *)(v->data + i * v->elementSize), depth + 1);
                 break;
             default:
-                perror("tried to print a non-char type vector as string\n");
+                fprintf(stderr, "tried to print a non-char type vector as string\n");
                 exit(EXIT_FAILURE);
         }
     }
@@ -123,7 +123,7 @@ vectorPrintAsString(vector_t* v) {
             _printVectorAsStringRecursive(v, 0);
             break;
         default:
-            perror("tried to print a non-char type vector as string\n");
+            fprintf(stderr, "tried to print a non-char type vector as string | type: %d\n", v->type);
             exit(EXIT_FAILURE);
     }
 }
@@ -131,8 +131,8 @@ vectorPrintAsString(vector_t* v) {
 vector_t*
 vectorInit(dataType_e type) {
     vector_t *v = malloc(sizeof(vector_t));
-    if (v == NULL) {
-        perror("failed to allocate memory for the vector\n");
+    if (!v) {
+        fprintf(stderr, "failed to allocate memory for the vector\n");
         exit(EXIT_FAILURE);
     }
 
@@ -153,13 +153,13 @@ vectorInit(dataType_e type) {
             v->elementSize = sizeof(vector_t);
             break;
         default:
-            perror("specify a valid vector type\n");
+            fprintf(stderr, "specify a valid vector type\n");
             exit(EXIT_FAILURE);
     }
     v->data = malloc(v->elementSize * v->capacity);
 
     if (v->data == NULL) {
-        perror("failed to allocate memory for vector data\n");
+        fprintf(stderr, "failed to allocate memory for vector data\n");
         exit(EXIT_FAILURE);
     }
 
@@ -176,28 +176,33 @@ vectorPush(vector_t* v, void* element) {
             *((float *)(v->data) + v->size) = *((float *)element);
             break;
         case CHAR:
+            // Allocate memory for the character
+            v->data = realloc(v->data, (v->size + 1) * v->elementSize);
+            if (!v->data) {
+                fprintf(stderr, "failed to allocate memory for vector data\n");
+                exit(EXIT_FAILURE);
+            }
             *((char *)(v->data) + v->size) = *((char *)element);
             break;
         case VECTOR:
             // Instead of reallocating memory for vector_t pointers, allocate memory for the vector data
             if (v->size == 0) {
                 // Allocate memory for the vector data for the first time
-                v->data = malloc(v->elementSize * v->capacity);
+                v->data = realloc(v->data, v->elementSize);
             } else {
                 // Reallocate memory for the vector data
-                v->data = realloc(v->data, v->elementSize * v->capacity);
+                v->data = realloc(v->data, v->elementSize * (v->size + 1));
             }
-            if (v->data == NULL) {
-                perror("failed to allocate memory for vector data\n");
+            if (!v->data) {
+                fprintf(stderr, "failed to allocate memory for vector data\n");
                 exit(EXIT_FAILURE);
             }
 
             // Copy the vector data from the element to the vector
             memcpy((vector_t *)(v->data) + v->size, (vector_t *)element, sizeof(vector_t));
-
             break;
         default:
-            perror("specify a valid vector type\n");
+            fprintf(stderr, "specify a valid vector type\n");
             exit(EXIT_FAILURE);
     }
 
@@ -239,7 +244,7 @@ vectorPop(vector_t* v) {
 
                 return vretval;
             default:
-                perror("specify a valid vector type\n");
+                fprintf(stderr, "specify a valid vector type\n");
                 exit(EXIT_FAILURE);
 
         }
@@ -312,7 +317,7 @@ vectorGetAt(vector_t* v, int index) {
         case VECTOR:
             return (vector_t *)(v->data) + index;
         default:
-            perror("specify a valid vector type\n");
+            fprintf(stderr, "specify a valid vector type\n");
             exit(EXIT_FAILURE);
     }
 }
@@ -320,7 +325,7 @@ vectorGetAt(vector_t* v, int index) {
 void
 vectorSetAt(vector_t* v, int index, void* element) {
     if (index >= v->size) {
-        perror("index out of range\n");
+        fprintf(stderr, "index out of range\n");
         exit(EXIT_FAILURE);
     }
 
@@ -338,7 +343,7 @@ vectorSetAt(vector_t* v, int index, void* element) {
             *((vector_t *)(v->data) + index) = *((vector_t *)element);
             break;
         default:
-            perror("specify a valid vector type\n");
+            fprintf(stderr, "specify a valid vector type\n");
             exit(EXIT_FAILURE);
     }
 }
@@ -346,7 +351,7 @@ vectorSetAt(vector_t* v, int index, void* element) {
 void
 vectorInsertAt(vector_t* v, int index, void* element) {
     if (index >= v->size) {
-        perror("index out of range\n");
+        fprintf(stderr, "index out of range\n");
         exit(EXIT_FAILURE);
     }
 
@@ -384,7 +389,7 @@ vectorInsertAt(vector_t* v, int index, void* element) {
             *((vector_t *)(v->data) + index) = *((vector_t *)element);
             break;
         default:
-            perror("specify a valid vector type\n");
+            fprintf(stderr, "specify a valid vector type\n");
             exit(EXIT_FAILURE);
     }
 }

test.txt

@@ -1,6 +1,6 @@
-this !1@#%
-is a big
-mega such large
-
-test
+this is a test
+mega such large test
 and
+
+this was an empty line
+!#%!@# <- symbols!